PRIME Observation Log 2025/09/06

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Raw Log (Time is in SA time)
Ramp Log (Time is in UT)
CCMain Error Log (Time is in SA time)
Observation Log (Time is in UT)

Date: 2025/09/06
Local observer: Asahi
Remote observer:
Weather: clear, cloudy
Comment:
Detector Temperature: 114.00010 +- 0.00297 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:45:26
Morning 06:23:52
Science Observation
(Sun altitude < -10°)
Start 19:06:47
End 06:02:34
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:06:47
End 01:04:12


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 07:29:34 10:55:46 0.686
GB Time 01:58:59 05:57:25 0.333
Non-GB Time 05:30:34 04:58:21 1.108


Institute Statistics
- ALLSKY time is equally distributed to each institute
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 360 00:17:09 00:33:25 0.513
GB 1096 00:52:14 01:58:59 0.439
SAAO 791 00:37:42 01:22:38 0.456
OU 791 00:37:42 01:22:38 0.456
NASA 791 00:37:42 01:22:38 0.456
ABC 791 00:37:42 01:22:38 0.456


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 360 00:17:09 00:33:25 0.513
Bulge 1072 00:51:05 01:56:24 0.439
SKY 24 00:01:08 00:02:35 0.443
all_sky_grid 3164 02:30:49 05:30:34 0.456


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OJ 360 00:17:09 00:33:25 0.513
GB76_test OH 16 00:00:45 00:04:58 0.153
GB76_dither OH 96 00:04:34 00:10:01 0.456
GB77_dither OH 96 00:04:34 00:10:18 0.444
GB94_dither OH 96 00:04:34 00:09:49 0.465
GB111_dither OH 96 00:04:34 00:09:50 0.465
GB110_dither OH 96 00:04:34 00:10:15 0.446
GB109_dither OH 48 00:02:17 00:05:00 0.457
GB108_dither OH 24 00:01:08 00:02:36 0.439
GB91_dither OH 24 00:01:08 00:03:32 0.324
GB74_dither OH 24 00:01:08 00:02:41 0.425
GB92_dither OH 24 00:01:08 00:02:27 0.465
GB93_dither OH 24 00:01:08 00:02:41 0.425
GB75_dither OH 48 00:02:17 00:05:03 0.453
GB78_dither OH 96 00:04:34 00:10:29 0.436
GB112_dither OH 48 00:02:17 00:04:43 0.484
GB79_dither OH 48 00:02:17 00:04:49 0.474
GB60_dither OH 24 00:01:08 00:02:21 0.484
GB95_dither OH 24 00:01:08 00:02:21 0.484
GB113_dither OH 24 00:01:08 00:02:21 0.484
GB114_dither OH 24 00:01:08 00:02:30 0.456
GB97_dither OH 24 00:01:08 00:02:21 0.484
GB96_dither OH 24 00:01:08 00:02:24 0.476
GB80_dither OH 24 00:01:08 00:02:41 0.424
GCsky 24 00:01:08 00:02:35 0.443
field10150_test 12 00:00:34 00:06:13 0.092
field10150 40 00:01:54 00:03:47 0.503
field10151 40 00:01:54 00:04:12 0.453
field10152 40 00:01:54 00:04:31 0.421
field10153 40 00:01:54 00:04:29 0.424
field10154 40 00:01:54 00:04:23 0.434
field10155 40 00:01:54 00:04:12 0.453
field10734 40 00:01:54 00:03:47 0.504
field10735 40 00:01:54 00:04:01 0.474
field10736 40 00:01:54 00:04:15 0.448
field10762 40 00:01:54 00:04:01 0.474
field10763 40 00:01:54 00:04:12 0.453
field10764 40 00:01:54 00:04:01 0.474
field10765 40 00:01:54 00:03:50 0.497
field10766 40 00:01:54 00:04:04 0.469
field10767 40 00:01:54 00:03:58 0.480
field10768 40 00:01:54 00:04:12 0.453
field10769 40 00:01:54 00:04:46 0.400
field10778 40 00:01:54 00:04:04 0.469
field10779 40 00:01:54 00:05:11 0.367
field5315 40 00:01:54 00:04:12 0.453
field5316 40 00:01:54 00:03:58 0.480
field5317 40 00:01:54 00:03:47 0.503
field5318 40 00:01:54 00:04:12 0.454
field5319 40 00:01:54 00:04:34 0.416
field5320 40 00:01:54 00:03:58 0.479
field5321 40 00:01:54 00:04:12 0.453
field5322 40 00:01:54 00:03:58 0.480
field5323 40 00:01:54 00:04:03 0.470
field5324 40 00:01:54 00:03:56 0.484
field5325 40 00:01:54 00:04:01 0.474
field5326 40 00:01:54 00:04:20 0.438
field5327 40 00:01:54 00:04:01 0.474
field5328 40 00:01:54 00:03:50 0.497
field5329 40 00:01:54 00:03:47 0.503
field5330 40 00:01:54 00:03:58 0.480
field5331 40 00:01:54 00:04:23 0.434
field5332 40 00:01:54 00:04:12 0.453
field5333 40 00:01:54 00:04:12 0.453
field5334 40 00:01:54 00:04:20 0.438
field5335 40 00:01:54 00:03:47 0.503
field5336 40 00:01:54 00:04:23 0.434
field5337 40 00:01:54 00:03:58 0.480
field5338 40 00:01:54 00:04:01 0.474
field5339 40 00:01:54 00:03:50 0.497
field5340 40 00:01:54 00:04:00 0.475
field5341 40 00:01:54 00:04:01 0.473
field5342 40 00:01:54 00:04:04 0.469
field5343 40 00:01:54 00:03:58 0.480
field5344 40 00:01:54 00:03:47 0.503
field5345 40 00:01:54 00:03:47 0.503
field5346 40 00:01:54 00:04:03 0.470
field5347 40 00:01:54 00:04:18 0.442
field5348 40 00:01:54 00:04:01 0.474
field5349 40 00:01:54 00:03:50 0.497
field5350 40 00:01:54 00:03:58 0.480
field5351 40 00:01:54 00:04:34 0.416
field5352 40 00:01:54 00:04:01 0.474
field5353 40 00:01:54 00:03:50 0.497
field5354 40 00:01:54 00:03:50 0.497
field5355 40 00:01:54 00:03:50 0.497
field5356 40 00:01:54 00:04:01 0.474
field5357 40 00:01:54 00:04:12 0.453
field5358 40 00:01:54 00:03:50 0.497
field5359 40 00:01:54 00:04:03 0.470
field5360 40 00:01:54 00:04:32 0.420
field5361 40 00:01:54 00:04:04 0.469
field5362 40 00:01:54 00:04:09 0.458
field5363 40 00:01:54 00:04:01 0.474
field5364 40 00:01:54 00:03:58 0.480
field5365 40 00:01:54 00:03:47 0.503
field5366 40 00:01:54 00:04:45 0.401
field5367 40 00:01:54 00:04:20 0.438
field5368 40 00:01:54 00:04:07 0.462
field5369 40 00:01:54 00:04:26 0.429
field5370 40 00:01:54 00:03:50 0.497
field5371 40 00:01:54 00:04:12 0.453
field5372 40 00:01:54 00:03:49 0.499
field5373 40 00:01:54 00:03:59 0.478
field5374 32 00:01:31 00:04:03 0.376










Stats so far in 2025
Monthly observed fraction so far in 2025
Month Observed Time
(hh:mm:ss) 		Expected Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Jan 103:35:29 259:42:08 0.399
Feb 53:54:42 259:20:18 0.208
Mar 158:57:47 319:07:20 0.498
Apr 161:02:39 338:08:53 0.476
May 244:24:55 372:31:50 0.656
Jun 209:59:39 370:50:11 0.566
Jul 224:49:02 377:25:14 0.596
Aug 230:19:15 357:22:01 0.644
Sep 47:10:34 66:02:28 0.714

Observed time so far in 2025
- Total time of each institute is calculated by the following
    [All observation time in 2025] = [Observed time so far] + [Remaining time in the future]
    [Remaining time in the future] = [Clear sky fraction] x [Remaining night time (Sun alt. < -10°)]
    
    [GB observation time in 2025] = [Observed GB time so far] + [Remaining GB time in the future]
    [Remaining GB time in the future] = [Clear sky fraction] x [Remaining GB night time (Sun alt. < -10° & GB alt. > 22°)]
    
    [Non-GB observation time in 2025] = [All observation time in 2025] - [GB observation time in 2025]
    
    [OU, NASA, ABC time in 2025] = 0.24 x [Non-GB observation time in 2025]
    [SAAO time in 2025] = 0.28 x [Non-GB observation time in 2025]
    
- ALLSKY time is equally distributed to each institute
- ToO time is distributed to each institute based on input of observer of each date
- Clear sky fraction of (0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5) is assumed for (Jan, ..., Dec) in the calculation of the remaining observation time
All
(hh:mm:ss) 		GB
(hh:mm:ss) 		Non-GB
(hh:mm:ss) 		SAAO
(hh:mm:ss) 		OU
(hh:mm:ss) 		NASA
(hh:mm:ss) 		ABC
(hh:mm:ss) 		CALIB
(hh:mm:ss)
Total 1962:40:27 1019:41:44 942:58:43 264:02:02 226:18:53 226:18:53 226:18:53 182:26:32
Observed 1434:01:42
(73.07%)		 907:13:59
(88.97%)		 526:47:42
(55.87%)		 122:58:16
(46.57%)		 117:21:31
(51.86%)		 204:27:34
(90.34%)		 82:00:20
(36.24%)		 182:26:32
(N/A)
Remaining 528:38:44
(26.93%)		 112:27:44
(11.03%)		 416:11:00
(44.13%)		 141:03:46
(53.43%)		 108:57:21
(48.14%)		 21:51:19
(9.66%)		 144:18:33
(63.76%)		 00:00:00
(N/A)











Camera status (2025/09/06)



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